EP1698522B1 - Fahrzeug-airbagvorrichtung - Google Patents

Fahrzeug-airbagvorrichtung Download PDF

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Publication number
EP1698522B1
EP1698522B1 EP04820135A EP04820135A EP1698522B1 EP 1698522 B1 EP1698522 B1 EP 1698522B1 EP 04820135 A EP04820135 A EP 04820135A EP 04820135 A EP04820135 A EP 04820135A EP 1698522 B1 EP1698522 B1 EP 1698522B1
Authority
EP
European Patent Office
Prior art keywords
gas
airbag
guide member
gas guide
inflator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04820135A
Other languages
English (en)
French (fr)
Other versions
EP1698522A4 (de
EP1698522A1 (de
Inventor
Masataka Autoliv Japan Ltd. FUKUDA
Yuichiro Autoliv Japan Ltd. YOSHIDA
Makoto Autoliv Japan Ltd. HIGANO
Mitsuo Autoliv Japan Ltd. NOGAMI
Taro Autoliv Japan Ltd. SHIMIZU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Publication of EP1698522A1 publication Critical patent/EP1698522A1/de
Publication of EP1698522A4 publication Critical patent/EP1698522A4/de
Application granted granted Critical
Publication of EP1698522B1 publication Critical patent/EP1698522B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R2021/161—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by additional means for controlling deployment trajectory
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B60R2021/23316—Inner seams, e.g. creating separate compartments or used as tethering means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • B60R2021/2617—Curtain bag nozzles

Definitions

  • EP1310409A2 discloses a side airbag arrangement having an inflator and a current regulating cloth to divert inflating gas to the front and rear of the airbag wherein an airbag part is formed by joining mutually facing fabric-like material pieces, an inflator part having an insertion end part which is inserted into and disposed within said airbag part, a gas guide part which directs the flow of gas from said inflator part into said airbag part, a pouch-like gas guide member being disposed within said gas guide part and having an attachment orifice into which said insertion end part of said inflator part is inserted, and vertically and horizontally directed gas injection nozzles facing the internal region of said airbag part, and convex connections formed by a mutually joined part of said fabric-like material pieces, said connections are disposed in opposition to and facing said gas guide member wherein said gas flowing into said airbag part from said inflator part when said airbag part is being inflated causes said gas guide member to come into contact with said connections.
  • a countermeasure applied to rectify this problem has been to install a specially designed gas guide member in the airbag and to attach it to the insertion end of the inflator as means of separating or directing the gas in specific directions therethrough. It has been assumed that the gas guide member may be made from the same flexible material as the airbag in order to be able to install the airbag to the vehicle body in the form of a rolled up spiral or folded over configuration.
  • the gas guide member is equipped with a gas discharge tube part which comes into contact with the convex seam when the airbag part is being inflated.
  • the gas discharge tube part acts to change the direction of gas flow, which is supplied by the inflator part through the gas guide part during inflation, to a transverse direction into the internal region of the airbag part.
  • the gas injection nozzles are provided with the gas discharge tube.
  • the part of the convex seam facing the gas guide member is formed approximately triangular in shape and the top part thereof is disposed facing the gas guide part in close proximity. It must be pointed out here that this approximate triangular shape is substantially a 3-sided shape. It is also preferable that each corner of the triangular shape is rounded off so as to form a curve through which adjacent sides of the triangle smoothly merge into each other. It is further preferable that the part of the gas discharge tube between the gas discharge nozzles come into contact with and straddle the two inclined sides of the top part of the convex seam during airbag inflation.
  • the gas guide member is made from an expandable material, and that it is designed to expand, as a result of the flow of gas therethrough, toward the convex seam a distance at least 5mm greater than the clearance therebetween.
  • the embodiment of the airbag 2 described in the drawings is structured from overlapping mutually joined the fabric-like material pieces 1, each piece 1 being formed to a length approximately equivalent to the combined length of the front and rear seats in the fore-aft direction, and to a height sufficient to cover the vertical dimension of the side windows.
  • Fastening tabs 4 are located on the perimeter of the airbag 2 as means of attaching the airbag 2 to the vehicle body, and tie tabs 4a are also provided to the perimeter of the airbag 2 as means of maintaining the airbag 2 in a rolled up configuration.
  • a vertical passage 1a is formed as an upwardly protruding part of the airbag 2 in the center of the upper edge of each piece 1
  • a horizontal passage 1b is formed as a horizontal part continuing in the horizontal direction from the vertical passage 1a.
  • the airbag 2 thus includes airbag body 2a which is internally partitioned at specific regions, inflator attachment part 2b which is defined by the horizontal passage 1b and into which the inflator 3 is inserted, and gas guide part 2c which is formed as part of the vertical passage 1a and connects the airbag body 2a with the inflator attachment part 2b as a continuation between them.
  • a dimension W1 that is, the width of the convex seam C3 facing the gas discharge tube 6c, be from 80 to 120% the width of a dimension W0 which is the width of the gas discharge tube 6c facing the convex seam C3.
  • a dimension W0 which is the width of the gas discharge tube 6c facing the convex seam C3.
  • the gas flow-through pressure be able to expand the gas guide member 6 toward the convex seam C3 to an extent at least 5mm greater than dimension "D". This value is obtained by subtracting the 20mm clearance dimension from the previously noted 25mm of extension of the gas guide member 6, and is done for the same reason as stated previously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)

Claims (9)

  1. Airbag-Einrichtung für Kraftfahrzeuge, umfassend:
    ein Airbag-Teil (2), das durch Verbinden von zueinander weisenden gewebeartigen Materialstücken (1) gebildet wird,
    ein Gasgeneratorteil (3), das zum Aufblasen des Airbag-Teils (2) verwendet wird, indem in dieses Gas injiziert wird, wobei das Gasgeneratorteil (3) ein Einfügungsendteil (3a) aufweist, das in das Airbag-Teil (2) eingefügt und darin angeordnet ist,
    ein Gasführungsteil (2c), das den Gasstrom von dem Gasgeneratorteil (3) in das Airbag-Teil (2) lenkt,
    ein taschenartiges Gasführungselement (6), das in dem Gasführungsteil (2c) angeordnet ist und eine Befestigungsöffnung (7) aufweist, in die das Einführungsendteil (3a) des Gasgeneratorteils (3) eingeführt wird, sowie Gasinjektionsdüsen (8), die zum Innenbereich des Airbag-Teils (2) weisen, und
    eine konvexe Naht (C3), die durch einen miteinander verbundenen Teil der gewebeartigen Materialstücke (1) gebildet wird, wobei die konvexe Naht (C3) dem Gasführungsteil (2c) gegenüberliegt und zu diesem weist, wobei
    der Gasstrom in das Airbag-Teil (2) von dem Gasgeneratorteil (3) beim Aufblasen des Airbag-Teils (2) bewirkt, dass das Gasführungselement (6) in Kontakt mit der konvexen Naht (C3) kommt.
  2. Airbag-Einrichtung für Kraftfahrzeuge gemäß Anspruch 1, wobei das Gasführungselement (6) ein Gasentladungsrohrteil enthält, das die Gasinjektionsdüsen (8) enthält, und das Gasentladungsrohr als Reaktion auf das Aufblasen des Airbag-Teils (2) in Kontakt mit der konvexen Naht (C3) kommt, sodass die Richtung des Gasstroms in das Airbag-Teil (2) von dem Gasgeneratorteil (3) durch das Gasführungsteil (2c) geändert wird.
  3. Airbag-Einrichtung für Kraftfahrzeuge gemäß Anspruch 1 oder 2, wobei mindestens eine Gasinjektionsdüse (8) des Gasführungselements (6) über jeder Seite eines Vorwölbungsteils (T) der konvexen Naht (C3) ausgebildet ist.
  4. Airbag-Einrichtung für Kraftfahrzeuge gemäß einem der Ansprüche 1 bis 3, wobei die konvexe Naht (C3) eine ungefähr dreieckige Form hat und deren Vorwölbungsteil so angeordnet ist, dass er in unmittelbarer Nähe zu dem Gasführungsteil (2c) weist.
  5. Airbag-Einrichtung für Kraftfahrzeuge gemäß Anspruch 3 oder 4, wobei ein Bereich des Gasentladungsrohrs zwischen den Gasinjektionsdüsen (8) beim Aufblasen des Airbags in Kontakt mit zwei abgeschrägten Seiten (S) des Vorwölbungsteils (T) kommt und diese spreizt.
  6. Airbag-Einrichtung für Kraftfahrzeuge gemäß einem der Ansprüche 1 bis 5, wobei die Breite (W1) der konvexen Naht (C3), die zum Gasführungselement (6) weist, 80 bis 120 % der Breite (W0) des Gasentladungsrohrs des Gasführungselements (6) beträgt.
  7. Airbag-Einrichtung für Kraftfahrzeuge gemäß einem der Ansprüche 1 bis 6, wobei der Zwischenraum (D) zwischen dem Gasführungselement (6) und der konvexen Naht (C3) weniger als 20 mm beträgt.
  8. Airbag-Einrichtung für Kraftfahrzeuge gemäß einem der Ansprüche 1 bis 7, wobei das Gasführungselement (6) aus einem dehnbaren Material besteht.
  9. Airbag-Einrichtung für Kraftfahrzeuge gemäß Anspruch 8, wobei der Gasstrom durch das Gasführungselement (6) bewirkt, dass sich das Element (6) verlängert, und zwar in eine Richtung auf die konvexe Naht (C3) zu und einen Abstand, der mindestens 5 mm größer als der Zwischenraum (D) zwischen ihnen ist.
EP04820135A 2003-12-08 2004-11-29 Fahrzeug-airbagvorrichtung Not-in-force EP1698522B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003409340 2003-12-08
PCT/JP2004/017688 WO2005056348A1 (ja) 2003-12-08 2004-11-29 車両のエアバッグ装置

Publications (3)

Publication Number Publication Date
EP1698522A1 EP1698522A1 (de) 2006-09-06
EP1698522A4 EP1698522A4 (de) 2007-01-17
EP1698522B1 true EP1698522B1 (de) 2009-05-06

Family

ID=34674892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04820135A Not-in-force EP1698522B1 (de) 2003-12-08 2004-11-29 Fahrzeug-airbagvorrichtung

Country Status (6)

Country Link
US (1) US7597348B2 (de)
EP (1) EP1698522B1 (de)
JP (1) JP4597866B2 (de)
AT (1) ATE430673T1 (de)
DE (1) DE602004021028D1 (de)
WO (1) WO2005056348A1 (de)

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Also Published As

Publication number Publication date
JPWO2005056348A1 (ja) 2007-12-06
EP1698522A4 (de) 2007-01-17
EP1698522A1 (de) 2006-09-06
JP4597866B2 (ja) 2010-12-15
WO2005056348A1 (ja) 2005-06-23
US20070257475A1 (en) 2007-11-08
ATE430673T1 (de) 2009-05-15
DE602004021028D1 (de) 2009-06-18
US7597348B2 (en) 2009-10-06

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